The firmware source code and Eagle files (schematic and PCB layout) are now on Github:
https://github.com/brouhaha/wd900-fd-adapter The current Eagle files are rev. 2, which has minor changes from rev. 1: * kludge connector P5 pin 1 mark corrected, was next to pin 2 on rev. 1 board * Two DRC clearance violations corrected * Power LED added * Pullup resistor for PIC MCLR pin added (but not actually needed) No rev. 2 boards have been made.